This way, its schema will show up in the API docs user interface:

<img src="/img/tutorial/dataclasses/image01.png">

## Dataclasses in Nested Data Structures { #dataclasses-in-nested-data-structures }

You can also combine `dataclasses` with other type annotations to make nested data structures.

        } else {
            return getOtherLocation(key);
        }
    } // -- InputLocation getLocation( Object )

    /**
     * Gets the map of nested element locations within this location.
     *
     * @return a map of keys to InputLocation instances for nested elements, or null if none
     */
    public java.util.Map<Object, InputLocation> getLocations() {
        return locations;

from fastapi import APIRouter, FastAPI
from fastapi.testclient import TestClient

# Lax app with nested routers, inner overrides to strict

app_nested = FastAPI(strict_content_type=False)  # lax app
outer_router = APIRouter(prefix="/outer")  # inherits lax from app
inner_strict = APIRouter(prefix="/strict", strict_content_type=True)
inner_default = APIRouter(prefix="/default")


@inner_strict.post("/items/")
async def inner_strict_post(data: dict):

        final int start = dstIndex;

        writeInt2(fid, dst, dstIndex);
        dstIndex += 2;
        dst[dstIndex] = (byte) 0x00; // Reserved
        dstIndex++;
        dst[dstIndex++] = (byte) 0x00; // Reserved
        writeInt4(securityInformation, dst, dstIndex);
        dstIndex += 4;

        return dstIndex - start;
    }

    @Override

        assertEquals("s3://bucket/", wizardAction.convertCrawlingPath("s3://bucket/"));
        assertEquals("s3://my-bucket-name/deep/nested/path/file.txt",
                wizardAction.convertCrawlingPath("s3://my-bucket-name/deep/nested/path/file.txt"));
    }

    @Test
    public void test_convertCrawlingPath_gcs_protocol() {

        }
    }

    private ReflectionValueExtractor() {}

    /**
     * <p>The implementation supports indexed, nested and mapped properties.</p>
     * <ul>
     * <li>nested properties should be defined by a dot, i.e. "user.address.street"</li>
     * <li>indexed properties (java.util.List or array instance) should be contains <code>(\\w+)\\[(\\d+)\\]</code>

        params.put("long", 123456789L);
        params.put("boolean", true);
        params.put("double", 3.14);

        Map<String, Object> nestedMap = new HashMap<>();
        nestedMap.put("nested-key", "nested-value");
        params.put("map", nestedMap);

        IndexUpdateCallback callback = new TestIndexUpdateCallback();

        // Execute store
        dataStore.store(config, callback, params);

import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

import java.util.Arrays;

import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.CsvSource;
import org.mockito.ArgumentCaptor;

import static org.junit.jupiter.api.Assertions.assertTrue;

import java.nio.ByteBuffer;
import java.nio.ByteOrder;

import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.CsvSource;
import org.junit.jupiter.params.provider.ValueSource;

import static org.junit.jupiter.api.Assertions.assertTrue;

import java.net.MalformedURLException;
import java.net.URL;

import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.mockito.Mock;
import org.mockito.junit.jupiter.MockitoExtension;

/**